function goURL(url){
	url=trimMark(url);
	if(url.indexOf('?')>=0){
		url += "&mark="+getDateStr() ;
	}else{
		url += "?mark="+getDateStr() ;
	}
	location.href = url;
}
function trimMark(url){
	var n = url.indexOf('?mark=');
	//has mark
	if(n>=0){
		return url.substring(0,n);
	}else{
		n = url.indexOf('&mark=');
		if(n>=0){
			return url.substring(0,n);

		}
	}

	return url;
}

function getDateStr(){
	var cDate = new Date();
	var DateStr = ""+cDate.getYear()+""+cDate.getMonth()+""+cDate.getDay()+cDate.getHours()+cDate.getMinutes()+cDate.getSeconds();
	return DateStr ;
}